This means that the number you input in place of '​identvalue'​ should be the CURRENT last index. The next value will be identvalue + 1. If you enter 999 then the next record inserted will have a value of 1000.

This means that the number you input in place of '​identvalue'​ should be the CURRENT last index. The next value will be identvalue + 1. If you enter 999 then the next record inserted will have a value of 1000.